UMI PERFORMANCE
UMI Performance 73-87 GM C10 Handling and Lowering Kit Stage 3 - Red
SKU: U01C 6403-R
Description
Part #: 6403-R
Features:
- UMI upper and lower a-arms increase caster and improve straight line stability
- UMI lowering springs and CP4S4 spindle lower the front 4.5
- Heavy duty 1-3/8 tubular front sway bar
- Lowering spindles accept stock GM brakes and bearings
- UMI flip kit on rear axle yields a 6 drop
- Three way adjustable 1 Pro-Tour style rear sway bar
- Bilstein gas charged shocks are firm yet comfortable for daily driving or performance use
- Power Tour, daily driver and corner carver proven
- Made In USA
Stage 3 handling and lowering kit features 4.5a/6a lowering combined with UMIa (TM)s street performance A-arms. Part of the #umitrucks line of products.
Fitment
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Specifications
| Brand | UMI PERFORMANCE |
| Part Number | U01C 6403-R |
Buy with Confidence
Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.
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